A deadly Israeli airstrike on Hezbollah’s stronghold in southern Beirut on Friday has left over a dozen people dead, including a high-ranking Hezbollah commander, sharply escalating the conflict between the two sides and raising fears of all-out war.

Israel has claimed the death of a senior Hezbollah military official after a rare Israeli airstrike in Beirut killed at least 31 people and wounded dozens more, shortly after Hezbollah pounded northern Israel with 140 rockets.